 When they come together to make music, the Welsh sing their traditional songs, not in unison, as is done elsewhere, but in parts, in many modes and modulations. When a choir gathers to sing, which happens often in this country, you will hear as many different parts and voices as there are performers.Book 1, chapter 13, p. 242.

 When two persons do the self-same thing, it oftentimes falls out that in the one it is criminal, in the other it is not so; not that the thing itself is different, but he who does it. Terence, Adelphi, V, III. 37.